Apple, ginger and turmeric filling
Bring the apples, agave syrup, ginger and turmeric to the boil in a pan. Reduce the heat, cover and simmer for approx. 20 mins. over a low heat. Puree the mixture with a hand blender. Mix the agar-agar with 1 tbsp of cold water, add to the pan, bring to the boil, boil for approx. 2 mins., transfer to a jar, leave to cool.
Place the margarine in a bowl, add the sugar and vanilla, beat using the whisk on a hand mixer until the mixture becomes lighter in colour. Mix in the flour and oat milk. Place the dough in a plastic bag, press down flat, refrigerate for approx. 1 hr.
On a lightly floured surface, roll out the dough in batches to approx. 5 mm thick (each time chilling the remainder of the dough). Cut out the hearts or chosen shapes, place on two trays lined with baking paper. Cut little shapes out of half of the biscuits, chill for approx. 30 mins.
Bake for approx. 8 mins. in an oven preheated to 180 °C (convection). Remove from the oven, allow to cool slightly, then leave to cool completely on a rack.
Spread the apple and turmeric filling over the biscuit bases. Dust the top half of the biscuits with icing sugar and place on top of the jam.